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Finding the Fourth Proportional to 874.90, 1,310.30 and 441

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Solution

The fourth proportional to 874.90, 1,310.30 and 441 is: 660.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    874.90 : 1,310.30 = 441 : x
  2. Step 2: Convert to fraction form
    874.90/1,310.30 = 441/x
  3. Step 3: Cross multiply
    874.90x = 1,310.30 × 441
  4. Step 4: Simplify right side
    874.90x = 577,842.30
  5. Step 5: Solve for x
    x = 577,842.30/874.90
  6. Step 6: Final answer
    x = 660.47

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Double scale
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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.